Creative 1820M, 1212M Settings, Headroom, Input too weak? Use -10 Input setting Output too weak?

4 - The PatchMix DSP Mixer

The Session

I/O Settings

You can set the level (-10dBV or +4 dBu) for each pair of analog outputs and the input gain setting for each pair of analog inputs.

An output setting of +4 provides the most output and is compatible with professional audio gear. Balanced output cables provide a +6dB hotter signal than unbalanced cables when used with balanced inputs. Do NOT use balanced cables unless your other gear has balanced inputs. See “Cables - balanced or unbalanced?” in the Appendix for more information.

Comparison of -10dBV & +4dBu Signal Levels

	Consumer		Professional
	(unbalanced)		(balanced)
			+20 dBu	<-- Clipping
Clipping -->	+ 6 dBV	=	+8 dBu	Headroom
Headroom	+ 2 dBV	=	+4 dBu }
	{-10 dBV	=	-8 dBu
0 dBV = 1V RMS			0dBu = .777V RMS

An input setting of -10 is compatible with consumer audio gear and works best with low level signals. (-10dBV is approximately 12dB lower than +4dBu.) Choose the setting that allows you to send or receive a full scale signal without clipping.

Setting correct input and output levels is important! You can measure the level of an input by inserting a meter into the first effect location in the strip. Adjust your external equipment outputs for the optimum signal level. See “To Set the Input Levels of a Strip” for details.

Input Level Settings

E-MU 1010

Optical Input

Select

fInput too weak? Use -10 Input setting.

Output too weak?

Use +4 Output setting

Output Level

Settings

E-MU 1010

Optical

Output Select

S/PDIF

Output

Format Select

E-MU Digital Audio System 31